Caption: Digestive system. Computer artwork showing a healthy human digestive system (red & orange) within a glass model of a woman's torso. At upper centre a short orange section of the oesophagus, a tube which transports food from mouth to stomach is seen. The bean-shaped stomach (orange, at centre) stores and digests food. The food then enters the small intestine, a coiled tube (at lower centre) which is the longest region of the digestive system. In the small intestine, food is further digested and absorbed into the blood. Food residue then passes into the large intestine or colon (red, around small intestine), a wide circular tract in which excess water is absorbed.